What is important to note first is that a TEMSI is a wheather forecast. It depicts the meteorlogical situation as it WILL be in one or two hours. On this exmple, no validity is indicated, but it might read like that : TEMSI France, valid on 2003/05/12 at 10:00 UTC. Then it would indicate the wheather situation as it would be at 12 local time that day. Clouds are indicated, as well as visibility, precipitations, altitude of freezing levels, etc...
Two TEMSI are available, TEMSI France, showing France only, as you can see here, and EUROC, covering a larger part of western Europe.